
.horizontal-layout .mind-map,
.horizontal-layout .description {
    flex: 1;
    min-height: 300px;
}
        .messages-container {
            display: none;
            padding: 24px;
            height: calc(100vh - 64px);
            gap: 20px;
        }

        .messages-container .left-nav {
            flex: 0 0 220px;
            background: #fff;
            border-radius: 8px;
            padding: 16px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
        }

        .messages-container .right-content {
            flex: 1;
            background: #fff;
            border-radius: 8px;
            padding: 16px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
            display: flex;
            flex-direction: column;
        }

        .messages-container .left-nav .demand-item {
            padding: 10px 12px;
            cursor: pointer;
            transition: all 0.2s;
            border-radius: 4px;
            margin-bottom: 4px;
            display: flex;
            align-items: center;
        }

        .messages-container .left-nav .demand-item:hover {
            background: #f0f7ff;
        }

        .messages-container .left-nav .demand-item.active {
            background: #e6f4ff;
            color: #1890ff;
            font-weight: 500;
            position: relative;
        }

        .messages-container .left-nav .demand-item.active::before {
            content: "";
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            background-color: #1890ff;
            border-radius: 0 2px 2px 0;
        }

        .messages-container .right-content .demand-details {
            padding: 16px;
            background: #f8f9fa;
            border-radius: 6px;
            margin-bottom: 16px;
        }

        .messages-container .right-content .demand-name {
            color: #333;
            font-weight: 500;
            margin-bottom: 8px;
            font-size: 16px;
        }

        .messages-container .right-content .user-name {
            color: #666;
            margin-bottom: 12px;
            font-size: 14px;
        }

        .messages-container .right-content .reply {
            color: #666;
            margin-bottom: 12px;
            padding: 12px;
            background: #f0f7ff;
            border-radius: 4px;
            border-left: 3px solid #1890ff;
            font-size: 14px;
        }

        .messages-container .right-content .reply-box {
            margin-top: 12px;
            padding: 12px;
            background: #f8f9fa;
            border-radius: 4px;
            display: none;
        }

        .messages-container .right-content .reply-textarea {
            width: 100%;
            padding: 10px;
            border: 1px solid #ddd;
            border-radius: 4px;
            min-height: 80px;
            resize: vertical;
            margin-bottom: 12px;
            font-family: inherit;
            font-size: 14px;
        }

        .messages-container .right-content .confirm-btn {
            padding: 8px 16px;
            background: #1890ff;
            color: white;
            border: none;
            border-radius: 4px;
            cursor: pointer;
            transition: all 0.3s;
            float: right;
            font-size: 14px;
        }

        .messages-container .right-content .confirm-btn:hover {
            background: #40a9ff;
        }

        .messages-container .right-content .message-list {
            flex: 1;
            overflow-y: auto;
            padding-right: 8px;
        }

        /* 消息样式区分 */
        .message-item {
            margin-bottom: 16px;
            padding: 12px;
            border-radius: 6px;
            transition: all 0.2s;
        }

        .message-item:hover {
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.05);
        }

        /* 评论样式 */
        .comment {
            background-color: #f8f9fa;
            border-left: 3px solid #ddd;
        }

        /* 回复样式 */
        .reply-message {
            background-color: #f0f7ff;
            border-left: 3px solid #1890ff;
            margin-left: 24px;
        }

        .message-item .sender {
            font-weight: 500;
            margin-bottom: 4px;
            color: #333;
            font-size: 14px;
        }

        .message-item .content {
            margin-bottom: 6px;
            color: #555;
            font-size: 14px;
        }

        .message-item .time {
            font-size: 12px;
            color: #999;
            text-align: right;
        }
